Chinese group StormBamboo spotted delivering Windows and macOS malware by compromising an ISP and using DNS poisoning.
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Over 35k Domains Hijacked in ‘Sitting Ducks’ Attacks
Threat actors have hijacked over 35,000 domains in five years because DNS providers fail to properly verify domain ownership.
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Hackers Exploit Flaw in Squarespace Migration to Hijack Domains
Hackers exploited a flaw to hijack cryptocurrency domains that were migrated from Google Domains to Squarespace.
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Attackers Use DNS Tunneling to Track Victim Activity, Scan Networks
Threat actors are using DNS tunneling to track victims’ interaction with spam and to scan network infrastructures.
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Chinese Hackers Have Been Probing DNS Networks Globally for Years: Report
While China-linked Muddling Meerkat’s operations look like DNS DDoS attacks, it seems unlikely that denial of service is their goal, at least in the near term.
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KeyTrap DNS Attack Could Disable Large Parts of Internet: Researchers
Patches released for a new DNSSEC vulnerability named KeyTrap, described as the worst DNS attack ever discovered.
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BIND Updates Patch High-Severity, Remotely Exploitable DoS Flaws
The Internet Systems Consortium (ISC) this week announced patches for multiple high-severity denial-of-service (DoS) vulnerabilities in the DNS software suite BIND.
The addressed issues could be exploited remotely to cause named – the BIND daemon that acts both as an authoritative name server and as a recursive resolver – to crash, or could lead to the exhaustion of the available memory.
The first of the security defects, tracked as CVE-2022-3094, can be exploited by sending a flood of dynamic DNS updates, which would cause named to allocate large amounts of memory, resulting in a crash due to a lack of free memory.
According to ISC, because allocated memory is only retained for clients for which access credentials are accepted, the scope of the vulnerability is limited to trusted clients that are allowed to make dynamic zone changes.
For BIND 9.11 and earlier branches, the flaw can be exploited to exhaust internal resources, which results in performance issues, but not a crash.
Tracked as CVE-2022-3736, the second issue leads to a crash “when stale cache and stale answers are enabled, option stale-answer-client-timeout is set to a positive integer, and the resolver receives an RRSIG query,” ISC explains. A remote attacker can trigger the bug by sending crafted queries to the resolver.
The third vulnerability, CVE-2022-3924, impacts the implementation of the stale-answer-client-timeout option, when the resolver receives too many queries that require recursion. If the number of clients waiting for recursion to complete is high enough, a race may occur between providing a stale answer to the longest waiting client and sending an early timeout SERVFAIL, causing named to crash.
All three vulnerabilities were resolved with the release of BIND versions 9.16.37, 9.18.11, and 9.19.9. ISC says it is not aware of any of these vulnerabilities being exploited, but encourages all users to update their BIND installations as soon as possible.
ISC also warns of CVE-2022-3488, a bug impacting all supported BIND preview edition versions (a special feature preview branch provided to eligible customers).
The issue can be triggered by sending two responses in quick succession from the same nameserver, both ECS pseudo-options, but with the first response broken, causing the resolver to reject the query response. When processing the second response, named crashes.
BIND preview edition version 9.16.37-S1 resolves all four security defects. Additional information on the addressed vulnerabilities can be found in the BIND 9 security vulnerability matrix.
Related: BIND Updates Patch High-Severity Vulnerabilities
Related: High-Severity Vulnerabilities Patched in BIND Server
Related: High-Severity DoS Vulnerability Patched in BIND DNS Software
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